Could not load file or assembly 'Jedox.Palo.Comm.dll' or one of its dependencies. The specified module could not be found.

There are a total of 4 dll files in the SDK ->
1. Jedox.Palo.Comm.dll
2. JedoxXlHelper.dll
3. libpalo_ng.dll
4. libpalo2.dll

Of these only Jedox.Palo.Comm.dll is a valid assembly / com component and can be added as a reference. I am unable to add references to the other three files directly.
But I have placed them in the bin/Debug folder of the application as can be seen here: img43.imageshack.us/img43/5048/image2zvi.png
Unlike the Palo SDKs, the Jedox SDKs are build for .Net Framework 4.0, so I am not changing that at all, the target framework is 4.0

So when I execute the code, a simple connection statement, I get this error:
Could not load file or assembly 'Jedox.Palo.Comm.dll' or one of its dependencies. The specified module could not be found.